Fix planning of recursive queries with duplicate outputs of partial plan #9153
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If the recursion base relation or the recursion step relation is planned so that it has duplicate output symbols, they need to be re-mapped to distinct symbols. This is necessary to successfully replace this part of the plan with another plan in the next recursion step. This is achieved by adding a disambiguating projection.
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martint
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Sep 9, 2021
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If the recursion base relation or the recursion step relation
is planned so that it has duplicate output symbols, they need to
be re-mapped to distinct symbols. This is necessary to successfully
replace this part of the plan with another plan in the next recursion
step.
This is achieved by adding a disambiguating projection.